Moon Compass

Frequently asked questions

We have tried to keep these answers honest — about what tradition claims, and about what it does not.

Void of course Moon

What happens if I do something during a void?

Most likely nothing. Tradition does not say "something bad will happen"; it says "what you begin may not produce the result you expect". A contract signed during a void is not void in law, and a journey begun in one does not end in an accident.

Treat it as an order of preference, not a prohibition: if you have the choice, pick another hour; if you don't, get on with it.

How long does a void last?

Anywhere from a few minutes to twenty hours, depending on which degree of the sign the Moon made its last aspect in. It happens about 13 times a month.

Why does another site show a different time?

Three possible reasons. First, time zone — many sites publish times in UTC. Second, method: Moon Compass calculates topocentrically (as seen from the city's coordinates) while many sources use geocentric positions; that can differ by a few minutes. Third, which aspects are counted: some schools count only the seven classical planets, others include the outer ones.

Moon phases

Why is the Full Moon time given to the minute?

Because a Full Moon is an instant, not a day — the second when the angle between Moon and Sun is exactly 180°. A calendar entry for "14 September" means it occurs at a particular minute of that day.

I changed city and the Full Moon time changed. Is that a bug?

No — that is correct. The event itself is one moment worldwide, but what your clock reads at that moment depends on where you are. A Full Moon at 13:04 in Ankara is 10:04 in London: the same instant.

Are phase and void the same thing?

No. The phase is the Moon's angle to the Sun. A void is the absence of remaining aspects to the other planets. They are calculated independently, and a Full Moon can be void.

Retrogrades

Do devices really break during Mercury retrograde?

No. Devices break in every period — during a retrograde we simply have a story ready to connect them. That is confirmation bias.

What tradition actually claims is more measured: retrograde periods suit review better than fresh starts.

How much of the year is retrograde?

It varies. Between September 2026 and September 2027: Mercury 67 days, Venus 42, Mars 81 — and 218 days (60%) with none of them retrograde.

Planetary hours

Why aren't the hours 60 minutes long?

Because daylight is divided into twelve parts and night into twelve of its own. In summer the day is longer, so day-hours run over 60 minutes and night-hours under.

Which day applies after midnight?

In this system the day begins at sunrise. Four in the morning on Tuesday still belongs to Monday's night and uses Monday's ruler.

The app

Do I need an account, or to give my birth date?

No. Moon Compass asks for no personal data and casts no birth chart. The sky is the same for everyone, and so is the calculation. You only choose a city, because the clock times depend on where you are.

What if the Best Time Finder returns nothing?

Widen the date range or lower the minimum duration. Where no two-hour uninterrupted window exists, a one-hour window often does.

Where do the calculations run?

Planetary positions, lunar phase and planetary hours are computed on your device and need no connection. Void of course periods are precomputed, fetched once and cached locally.

Back to the guide

Other topics.

Open Moon Compass

Try the app in your browser.